XL-Trace System. Installation and Operation manual for pipe freeze protection and flow maintenance

Transcription

1 XL-Trace System Installation and Operation manual for pipe freeze protection and flow maintenance Thermal building solutions

2 Important Safeguards and Warnings WARNING: FIRE AND SHOCK HAZARD. Raychem heat-tracing systems must be installed correctly to ensure proper operation and to prevent shock and fire. Read these important warnings and carefully follow all the installation instructions. To minimize the danger of fire from sustained electrical arcing if the heating cable is damaged or improperly installed, and to comply with Pentair Thermal Building Solutions requirements, agency certifications, and national electrical codes, ground-fault equipment protection must be used on each heating cable branch circuit. Arcing may not be stopped by conventional circuit breakers. Approvals and performance are based on the use of Pentair Thermal Building Solutions-specified parts only. Do not substitute parts or use vinyl electrical tape. Bus wires will short if they contact each other. Keep bus wires separated. Connection kits and cable ends must be kept dry before and during installation. The black heating cable core is conductive and can short. It must be properly insulated and kept dry. Damaged bus wires can overheat or short. Do not break bus wire strands when preparing the cable for connection. Damaged heating cable can cause electrical arcing or fire. Do not use metal attachments such as pipe straps or tie wire. Use only Pentair Thermal Building Solutions approved tapes and cable ties to secure the cable to the pipe. Do not attempt to repair or energize damaged heating cable. Remove damaged sections at once and replace them with a new length using the appropriate Raychem splice kit. Replace damaged connection kits. Use only fire-resistant insulation materials such as fiberglass wrap or flame-retardant foams. Note: Pipes are shown without insulation for illustrative purposes only. All pipe installations must be fully covered with thermal insulation. ii EN-RaychemXLTracePipeFreezeProtection-IM-H /16

3 Table of Contents 1 General Information Use of the Manual XL-Trace Applications Safety Guidelines Approvals 3 2 Installation Guidelines Heating Cable Storage Pre-Installation Checks Heating Cable Installation Heating Cable Connections 17 3 Thermal Insulation Insulating the System Insulation Installation 25 4 Power Supply and Electrical Protection Voltage Rating Circuit Breaker Sizing Electrical Loading Ground-Fault Protection Important Power Supply Safeguards 29 5 Temperature Controls Ambient-Sensing Control Line-Sensing Control Wiring Schematic for Thermostat 32 6 Commissioning and Preventive Maintenance Tests 36 7 Test Procedures System Tests Fault Location Tests 43 EN-RaychemXLTracePipeFreezeProtection-IM-H /16 iii

4 8 Troubleshooting Guide 48 9 Appendix 50 Installation and Inspection Records iv EN-RaychemXLTracePipeFreezeProtection-IM-H /16

5 1 General Information 1.1 Use of the Manual This manual covers the installation of Raychem XL-Trace self-regulating heating cables and connections for commercial construction pipe systems in ordinary (nonhazardous) areas. The manual covers general heating cable installation procedures and specific installation details and shows available connection kits for the different applications. The manual also discusses controls, testing, and periodic maintenance. This manual assumes that the proper heat-tracing design has been completed according to the Pipe Freeze Protection and Flow Maintenance Design Guide (H55838). Only the applications described in Section 1.2 are approved by Pentair Thermal Building Solutions for XL-Trace systems when used with approved Raychem connection kits. The instructions in this manual and the installation instructions included with the connection kits, control systems, power distribution systems, and accessories must be followed for the Pentair warranty to apply. Contact your Pentair Thermal Building Solutions representative for other applications and products. For additional information, contact: Pentair Thermal Building Solutions 7433 Harwin Drive Houston, TX USA Tel: Tel: Fax: Fax: EN-RaychemXLTracePipeFreezeProtection-IM-H /16 1

6 1 General Information 1.2 XL-Trace Applications XL-Trace heat-tracing systems are approved and qualified for the applications listed below. Freeze protection General water piping. Freeze protection (40 F (4 C) maintain) of insulated metallic or plastic water piping. Sprinkler piping systems. Freeze protection (40 F (4 C) maintain) of insulated metallic standpipes and supply piping up to 20". Flow maintenance Greasy waste lines. Flow maintenance (110 F (43 C) maintain) of insulated-grease disposal lines. Fuel lines. Flow maintenance (40 F (4 C) maintain) for insulated metallic piping containing #2 fuel oil. For heating cable applications other than those listed above, please see your Pentair Thermal Building Solutions representative or call Pentair at (800) Safety Guidelines As with any electrical equipment, the safety and reliability of any system depends on the quality of the products selected and the manner in which they are installed and maintained. Incorrect design, handling, installation, or maintenance of any of the system connection kits could damage the system and may result in inadequate performance, overheating, electric shock, or fire. To minimize these risks and to ensure that the system performs reliably, read and carefully follow the information, warnings, and instructions in this guide. Pay special attention to the following: Important instructions are marked Important Warnings are marked WARNING 2 EN-RaychemXLTracePipeFreezeProtection-IM-H /16

7 1 General Information 1.4 Approvals XL-Trace heat-tracing systems carry agency approvals for the different applications shown in Section 1.2. For detailed information on which approvals are carried for the specific application, refer to the Pipe Freeze Protection and Flow Maintenance design guide (H55838). Warranty Pentair Thermal Management standard limited warranty applies to all products. An extension of the limited warranty period to ten (10) years from the date of installation is available if a properly completed online warranty form is submitted within thirty (30) days from the date of installation. You can access the complete warranty on our web site at www. pentairthermal.com. EN-RaychemXLTracePipeFreezeProtection-IM-H /16 3

8 2 Installation Guidelines 2.1 Heating Cable Storage Store the heating cable in a clean, dry location. Temperature range: 0 F ( 18 C) to 140 F (60 C). Protect the heating cable from mechanical damage. 2.2 Pre-Installation Checks Check materials received Catalog number: 5, 8 or 12 XL 1 or 2 -CR -CT Power output (W/ft) Product family Voltage 1 = 120 Vac (only available for 5 or 8) 2 = Vac (available for 5, 8, or 12) Jacket type: Polyolefin or Fluoropolymer (Required for grease and fuel lines) Figure 1: XL-Trace catalog number Review the heating cable design and compare the list of materials to the catalog numbers of the heating cables and connection kits received to confirm that the proper materials are on site. The heating cable type is printed on its jacket. Ensure that the service voltage available is correct for the XL-Trace heating cable selection. Inspect the heating cable and connection kits to ensure there is no in-transit damage. Verify the system design does not exceed the maximum exposure temperature of the heating cable 5XL/8XL: 150 F (65 C) 12XL: 185 F (85 C) Verify that the heating cable jackets are not damaged by conducting the insulation resistance test (refer to Section 7) on each reel of heating cable. Do not power the heating cable when it s on the reel. 4 EN-RaychemXLTracePipeFreezeProtection-IM-H /16

9 2 Installation Guidelines Check piping to be traced Make sure all mechanical pipe testing (i.e. hydrostatic testing/purging) is complete and the system has been cleared by the client for tracing. Walk the system and plan the routing of the heating cable on the pipe. Inspect the piping and remove any burrs, rough surfaces, or sharp edges. 2.3 Heating Cable Installation Minimum installation temperature of: 0 F ( 18 C). Heating cable installation involves three basic steps: 1. Paying out the heating cable 2. Attaching the heating cable to the pipe 3. Wrapping heat sinks Paying out the heating cable Mount the reel on a holder and place it near either end of the pipe run to be traced. Use a reel holder that pays out smoothly with little tension as shown in Figure 2. Avoid jerking the heating cable while pulling. Pay out the heating cable and loosely string it along the pipe, making sure the heating cable is always next to the pipe when crossing obstacles. If the heating cable is on the wrong side of a crossing pipe or I-beam, you will have to reinstall it or cut and splice it. EN-RaychemXLTracePipeFreezeProtection-IM-H /16 5

10 2 Installation Guidelines Figure 2: Paying out the heating cable When paying out the heating cable, AVOID: Sharp edges Excessive pulling force or jerking Kinking or crushing Walking on or running over the heating cable with equipment WARNING: Fire and shock hazard. Do not install damaged heating cable. Connection kits and heating cable ends must be kept dry before and during installation. Attaching the heating cable Once the heating cable has been run for the entire section, begin fastening it to the pipe. Start at the end and work toward the reel. The additional heating cable required for valves and other heat sinks is shown in Table 1 and Table 2. Refer to Table 3 for the additional heating cable required for connection kits. The heating cable may be installed in single or in multiple runs as required by the design. 6 EN-RaychemXLTracePipeFreezeProtection-IM-H /16

11 2 Installation Guidelines Figure 3: Attaching the heating cable EN-RaychemXLTracePipeFreezeProtection-IM-H /16 7

12 2 Installation Guidelines Table 1: Additional Heating Cable for Valves Pipe diameter (IPS) Heating cable in feet (meters) 1/2 0.8 (0.24) 3/4 1.3 (0.4) (0.6) 1-1/4 3.3 (1.1) 1-1/2 4.3 (1.3) (1.3) (1.3) (1.3) (1.5) (1.5) (1.7) (1.9) (2.2) (2.9) (3.2) Table 2: Additional Heating Cable for Pipe Supports and Flanges Support Pipe hangers (insulated) Pipe hangers noninsulated and U-bolt supports: Welded support shoes Flanges Additional heating cable No additional heating cable Add 2x pipe diameter Add 3x the length of the shoe Add 2x pipe diameter Note: For applications where more than one heating cable is required per foot of pipe, this correction factor applies for each heating cable run. 8 EN-RaychemXLTracePipeFreezeProtection-IM-H /16

13 2 Installation Guidelines Run insulation through the pipe hanger ensuring that the pipe is not resting on the heater. Pipe hanger under insulation Pipe hanger over insulation Insulation over pipe hanger Heating cable over pipe hanger Heating cable Heating cable beneath insulation and pipe hanger Heating cable Figure 4: Pipe hanger with heating cable Figure 5: Single pipe floor penetration When making floor or wall penetrations, make sure the hole is large enough to accommodate the pipe and the thermal insulation. When sealing around pipes at floor penetrations, avoid damaging or cutting the heating cable, or pinching it between the pipe and the concrete. EN-RaychemXLTracePipeFreezeProtection-IM-H /16 9

14 2 Installation Guidelines The heating cable must not be embedded directly in the sealing material; the pipe should have thermal insulation over it (if allowed by local codes) or the heating cable should be run through the penetration in a tube or conduit. If the conduit must be sealed, use a pliable fire-resistant material (Dow Corning Fire Stop, 3M Fire Barrier, or T&B Flame- Safe) that can be removed if necessary. Figure 6: Multiple pipe floor penetration On vertical piping groups, run the heating cable along the inside of the pipe close to other pipes so it will not be damaged if the pipe hits the side of the floor penetration. Run the heating cable over the outside of the pipe support. Do not clamp the heating cable to the pipe with the pipe support. In high-rise construction it may be necessary to install the XL-Trace system 10 or 12 floors at a time to fit into the construction schedule. If so, the end of the heating cable should be sealed with a RayClic-E end seal and placed in an accessible location. This allows testing of one part of the heating cable at a time, and allows splicing it to another section when the system is complete. When XL-Trace is installed behind walls, the power connection kit must be accessible. Whenever possible, position the heating cable on the lower section of the pipe as shown in Figure 7 to protect it from damage. 10 EN-RaychemXLTracePipeFreezeProtection-IM-H /16

15 2 Installation Guidelines One heating cable Two heating cables Figure 7: Positioning the heating cable Securing the heating cable WARNING: Damage to the heating cable can cause electrical arcing or fire. Do not use metal attachments such as pipe straps or tie wire. Use only Pentair Thermal Building Solutions-approved tapes or plastic cable ties. Important: Before taping the heating cable to the pipe, make sure all heat-tracing allowances for flanges, valves, supports, and other connection kits have been verified. Use one of the following attachment methods to secure the heating cable onto the pipe: GT-66 or GS-54 glass cloth tape, AT-180 aluminum tape, or plastic cable ties. glass cloth adhesive tape GT-66 (66-foot roll) general-purpose tape for installation at 40 F (4 C) and above. Apply at 1-foot intervals. GS-54 (54-foot roll) general-purpose tape for installation below 40 F (4 C). Apply at 1-foot intervals. AT-180 aluminum tape Required for plastic pipe applications to ensure proper power output of heating cable. EN-RaychemXLTracePipeFreezeProtection-IM-H /16 11

16 2 Installation Guidelines Tape lengthwise over the heating cable as required by the design drawing or specification (see Figure 8). Recommended for heat-tracing pump bodies or odd-shaped equipment, or as called out in the design drawing as a heat-transfer aid. Install at temperatures above 32 F (0 C). AT-180 aluminum tape Pipe Heating cable 1 ft (0.3 m) Glass cloth tape Weather proofing Thermal insulation Pipe Heating cable AT-180 aluminum tape over heating cable (Required for proper output for plastic pipe applications) Figure 8: Attaching the heating cable cable ties Recommended in applications where the pipe surface prevents proper tape adhesion. Use plastic cable ties only. Cable ties must be hand-tightened only to prevent damage to heating cable! Bending/Crossing/Cutting the Heating Cable bending the heating cable When positioning the heating cable on the pipe, do not bend tighter than 1/2" radius. The heating cable does not bend easily in the flat plane. Do not force such a bend, as the heating cable will be damaged. 12 EN-RaychemXLTracePipeFreezeProtection-IM-H /16

17 2 Installation Guidelines 1/2" Figure 9: Bending technique crossing the heating cable XL-Trace heating cables are self-regulating and may be overlapped whenever necessary without overheating or burning out. cutting the heating cable Cut the heating cable to the desired length after it is attached to the pipe. XL-Trace can be cut to length without affecting the heat output per foot. Wrapping the Heat Sinks Once the straight sections are secured the heating cable can be secured to the heat sinks. Attach the heating cable to the heat sinks according to Figure 10 below. The length of heating cable installed is determined in the design. EN-RaychemXLTracePipeFreezeProtection-IM-H /16 13

18 2 Installation Guidelines Valve body Glass tape Pipe Heating cable Multiple crossovers allowed for self-regulating cables Note: Cable loop length varies depending on heat loss. Pipe Heating cable Single crossover only, allowed for power-limiting cables Figure 10: Valve Glass tape (typical) Heating cable Loop length is twice the diameter of the pipe Figure 11: Flange 14 EN-RaychemXLTracePipeFreezeProtection-IM-H /16

19 2 Installation Guidelines Pipe Glass tape Heating cable Figure 12: Pressure gauge To power connection Pump discharge Heating cable Glass tape Pump body Pump suction Motor Use AT-180 tape Figure 13: Split case centrifugal pump EN-RaychemXLTracePipeFreezeProtection-IM-H /16 15

20 2 Installation Guidelines Heating cable loop Glass tape Support shoe Pipe Heating cable secured to pipe Figure 14: Pipe support shoe Heating cable Glass tape (typical) For pipe diameters of 2" and larger, the heating cable should be installed on the outside (long) radius of the elbow. Figure 15: Elbow 16 EN-RaychemXLTracePipeFreezeProtection-IM-H /16

21 2 Installation Guidelines Pipe hanger under insulation Pipe hanger over insulation Insulation over pipe hanger Heating cable over pipe hanger Heating cable Heating cable beneath insulation and pipe hanger Heating cable Figure 16: Pipe hanger 2.4 Heating Cable Connections General Requirements All XL-Trace systems require a power connection and end seal kit. Splice and tee kits are used as required. Use Table 3 (for aboveground applications) and Table 4 (for belowground applications) to select the appropriate connection kits. When practical, mount connection kits on top of the pipe. Electrical conduit leading to power connection kits must have low-point drains installed to avoid condensation entry into the heating system. All heating cable connections must be mounted above grade level. If your design has an exposure temperature >150 F (65 C) but < 185 F (85 C), install all connections kits off the pipe. WARNING: Connection kit approvals and performance are based on the use of specified parts only. Do not use substitute parts or vinyl electrical tape. Follow installation instructions provided with each kit. EN-RaychemXLTracePipeFreezeProtection-IM-H /16 17

22 2 Installation Guidelines EC-TS-AMB electronic thermostat RayClic-PC power connection Junction box RayClic-S splice RayClic-LE lighted end seal (optional) Insulation RayClic-T tee RayClic-E end seal Figure 17: Aboveground XL-Trace System Use Table 3 for general aboveground piping, sprinkler piping, and grease and fuel lines. Allow extra heating cable for ease of connection kit installation. 18 EN-RaychemXLTracePipeFreezeProtection-IM-H /16

23 2 Installation Guidelines Table 3: Connection Kits for General Aboveground Piping Catalog number RayClic-PC 2,3 Description Power connection and end seal kit; use 1 per circuit Standard pkg: 1 Power connection and end seal kit; use 1 per circuit Standard pkg: 1 Junction box not included Heating cable allowance 1 2 ft (0.6 m) 2 ft (0.6 m) FTC-P 4,5 RayClic-S 2,3,6 RayClic-T 2,6 Splice used to join two sections of heating cable Standard pkg: 1 Tee kit with end seal; use as needed for pipe branches Standard pkg: 1 Alternate lighted end seal Standard pkg: 1 2 ft (0.6 m) 2 ft (0.6 m) 2 ft (0.6 m) RayClic-LE EN-RaychemXLTracePipeFreezeProtection-IM-H /16 19

24 2 Installation Guidelines Table 3: Connection Kits for General Aboveground Piping Catalog number Continued FTC-HST 4 Description Heating cable allowance 1 Low-profile splice/tee; use as 3 ft (0.9 m) needed for pipe branches Standard pkg: 2 Replacement end seal Standard pkg: ft (0.1 m) RayClic-E 3 1 For ease of component installation, allow extra heating cable. 2 Powered splice, powered tee, and cross (tee with three legs) connections are also available. 3 For grease and fuel lines, install RayClic-LE or end seal off the pipe in junction box. 4 Not permitted with grease or fuel lines. 5 Use for circuits supplied with 40 A circuit breaker. 6 For grease and fuel lines, install tees and splices on pipe mounting bracket (RayClic-SB-04). 20 EN-RaychemXLTracePipeFreezeProtection-IM-H /16

25 2 Installation Guidelines Table 4: Accessories for General Aboveground Piping Catalog numberdescription Electric Traced label (use 1 label per 10 feet of pipe) Heating cable allowance 10 labels ETL GT-66 GS-54 AT-180 RayClic-SB-04 Glass cloth adhesive tape for attaching heating cable to pipe at 40 F (4 C) or above. See Table 7. Glass cloth adhesive tape for attaching heating cable to pipe above 40 F ( 40 C). See Table 7. Aluminum tape. Required for attaching heating cable to plastic pipe (use 1 foot of tape per foot of heating cable). Pipe mounting bracket. Required for mounting the kits off the pipe for exposure temperatures greater than 150 F (65 C) and for grease and fuel line splices and tees. 66 ft 54 ft 180 ft 1 ea EN-RaychemXLTracePipeFreezeProtection-IM-H /16 21

26 30F 1C 50F 10C 70F 21C 110F 43C 90F 32C 2 Installation Guidelines EC-TS-10 or EC-TS-25 electronic thermostat Wall FTC-XC power connection Conduit Ground Alternate end seal RayClic-LE* with wall mounting bracket Temperature sensor Insulation Junction box RayClic-E end seal RayClic-PC* Ground with wall mountiung bracket XL-Trace heating cable Conduit Alternate power connection *To protect the heating cable run it inside Convolex tubing between the conduit and the RayClic connection kits. Wall Figure 18: Buried pipe XL-Trace System 22 EN-RaychemXLTracePipeFreezeProtection-IM-H /16

27 3 1/8" 2 Installation Guidelines Table 5: Connection Kits for General Buried Piping Catalog number FTC-XC Description Power connection and end seal Junction box supplied by customer Use 1 per circuit Standard pkg: 1 Power connection and end seal kit Standard pkg: 1 Heating cable allowance* 2 ft (0.6 m) RayClic-PC RayClic-E Replacement end seal. Standard pkg: 1 Alternate lighted end seal Standard pkg: ft (0.1 m) 2 ft (0.6 m) RayClic-LE * For ease of connection kit installation, allow extra heating cable. EN-RaychemXLTracePipeFreezeProtection-IM-H /16 23

28 2 Installation Guidelines Table 6: Accessories for General Buried Piping Catalog number Description Standard pkg ETL Electric Traced label (use 1 10 labels label per 10 feet of pipe) GT-66 Glass cloth adhesive tape for 66 ft attaching heating cable to pipe at 40 F (4 C) or above. See Table 7. GS-54 Glass cloth adhesive tape for 54 ft attaching heating cable to pipe above 40 F ( 40 C). See Table 7. AT-180 Aluminum tape. Required for 180 ft attaching heating cable to plastic pipe (use 1 foot of tape per foot of heating cable). RayClic-SB-02 Wall mounting bracket 1 Table 7: Quantity of Glass Cloth Adhesive Tape Required (attach at 1-foot intervals) Pipe size (in) < Feet of pipe per GT-66 roll Feet of pipe per GS-54 roll EN-RaychemXLTracePipeFreezeProtection-IM-H /16

29 3 Thermal Insulation 3.1 Insulating the System Pipes must be insulated with the correct thermal insulation to maintain the desired pipe temperatures. Confirm that the insulation thickness agrees with the system design. 3.2 Insulation Installation Before insulating the pipe, visually inspect the heating cable and connection kits to ensure they are properly installed and there are no signs of damage. Damaged heating cable or connection kits must be replaced. Check that the insulation type and thickness is correct. Insulate the pipes immediately after the heating cable is installed and has passed all tests to minimize damage to the heating cable. Insulate the pipe at floor and wall penetrations. Failure to do so will cause cold spots in the water system and could lead to damage to the heating cable. If local codes do not allow this, the heating cable should be run through a conduit or channel before the firestop is installed. Use a fire-resistant sealing compoind such as Dow Corning Fire Stop, 3M Fire Barrier, or T&B Flame-Safe. Do not use staples to seal insulation. Use tape or the the adhesive-lined edge of the insulation to ensure that the seam remains sealed. Staples can damage the heating cable. Figure 19: Sealing the insulation seam EN-RaychemXLTracePipeFreezeProtection-IM-H /16 25

30 3 Thermal Insulation All systems for outdoor, buried, or wet areas must use waterproof fire-resistant thermal insulation. Mark the location of splices, tees, and end seals on the outside of the insulation with labels provided in the kits, while installing the insulation. Use large diameter insulation or sheets to cover splices, tees, or service loops. Figure 20: Installing connection kits below insulation Figure 21: Installing connection kits above insulation 26 EN-RaychemXLTracePipeFreezeProtection-IM-H /16

31 3 Thermal Insulation Make sure that all heat-traced piping, fittings, wall penetrations, and branch piping are insulated. Correctly designed systems require properly installed and dry thermal insulation. Uninsulated or wet sections of pipe can result in cold spots or frozen sections. After installing insulation, electrical codes require that you install Electric Traced labels along the piping at suitable intervals (10-foot intervals recommended) on alternate sides. WARNING: Use only fire-resistant insulation materials such as fiberglass wrap or flame-retardant foams. EN-RaychemXLTracePipeFreezeProtection-IM-H /16 27

32 4 Power Supply and Electrical Protection 4.1 Voltage Rating Verify that the supply voltage is either 120 or volts as specified by the XL-Trace system design and printed on the jacket of the heating cable. 4.2 Circuit Breaker Sizing Circuit breakers must be sized using the heating cable lengths shown in the Appendix. Do not exceed the maximum circuit length shown for each breaker size.use circuit breakers that incorporate 30-mA ground-fault circuit protection, or provide equivalent levels of ground-fault protection. 4.3 Electrical Loading The maximum current draw for XL-Trace heating cables is shown in the Appendix. To size the transformer, multiply the total heating cable length (ft) by the appropriate current draw. 4.4 Ground-Fault Protection If the heating cable is improperly installed or physically damaged to the point that water contacts the bus wires, sustained arcing or fire could result. If arcing does occur, the fault current may be too low to trip conventional circuit breakers. Pentair Thermal Building Solutions and national electrical codes require both ground-fault protection of equipment and a grounded metallic covering on all heating cables. Ground-fault protection must be provided by the installer. WARNING: To minimize the danger of fire from sustained electrical arcing if the heating cable is damaged or improperly installed, and to comply with Pentair Thermal Building Solutions requirements, agency certifications, and national electrical codes, ground-fault equipment protection must be used on each heating cable branch circuit. Arcing may not be stopped by conventional circuit breakers. WARNING: Disconnect all power before making connections to the heating cable. 28 EN-RaychemXLTracePipeFreezeProtection-IM-H /16

33 4 Power Supply and Electrical Protection 4.5 Important Power Supply Safeguards Make sure that the heating cable load you are connecting is within the rating of the control system selected. Check the design drawings for the heating cable load. The electrical conduit that feeds wiring to the control device must have a low-point drain so condensation will not enter the thermostat enclosure. Make sure that the line voltage you are connecting to the control system is correct. For proper wiring, follow the installation instructions enclosed with the control device. EN-RaychemXLTracePipeFreezeProtection-IM-H /16 29

34 R 5 Temperature Controls 5.1 Ambient-Sensing Control Ambient-sensing systems energize the circuit when the ambient temperature drops below the set point. Mount the device above grade level and out of sunlight. Mount the device where it will be exposed to the coldest temperature and the highest wind. AMC-1A ambient-sensing thermostat EC-TS-AMB ambient-sensing thermostat Figure 22: Ambient-sensing thermostats 5.2 Line-Sensing Control Line-sensing systems sense the pipe temperature by means of a sensor attached to the pipe and connected to the device. Install the sensor on the pipe at 90 degrees from the heating cable so that the heating cable does not thermally interfere with the sensor. Be sure the sensor is firmly attached with aluminum tape to the pipe in order to get good thermal contact between the bulb and the pipe. Locate the sensor at least 3 feet (1 meter) from any heat sinks, such as valves, pipe supports, and pumps. Ideally, the sensor should be located at the end of the heating cable circuit. Be sure that you set the control to the proper temperature. Mount the device on a nearby wall or support, or install a mounting stanchion. Thermostats must 30 EN-RaychemXLTracePipeFreezeProtection-IM-H /16

35 R R 5 Temperature Controls be mounted above grade level. In all cases, protect the sensor from physical damage. To prevent damage, mount the device where it will be away from foot and equipment traffic. To prevent water entry, seal the insulation where the capillary tube exits the insulation. AMC-1B line-sensing thermostat AMC-F5 ambient/line-sensing thermostat with a fixed setpoint at 40 F Figure 23: Mechanical thermostats EC-TS-10/25 line-sensing electronic thermostat Figure 24: Electronic thermostat EN-RaychemXLTracePipeFreezeProtection-IM-H /16 31

36 5 Temperature Controls Raychem 910 electronic controller Raychem 920 electronic controller Figure 25: Electronic controllers 5.3 Wiring Schematic for Thermostat The following is a typical wiring schematic for a thermostat. Single circuit control Heating cable Temperature controller 1-pole GFEP breaker ø 1 ø supply N Heating cable sheath, braid or ground G Figure 26: Single circuit control 32 EN-RaychemXLTracePipeFreezeProtection-IM-H /16

37 5 Temperature Controls Group control 1-pole GFEP breaker Temperature controller C ø 1 ø supply N Contactor ø1 ø2 ø3 N 3-phase 4-wire supply (WYE) 3-pole main breaker G (Typ 3) Heating cable sheath, braid or ground Figure 27: Group circuit control EN-RaychemXLTracePipeFreezeProtection-IM-H /16 33

38 5 Temperature Controls Alarm horn (optional) Door disconnect (optional) Push button for light testing COMMON ALARM PUSH TO ACKNOWLEDGE A Selector switch POWER ON C HAND/OFF/AUTO Alarm option shown above Main circuit breaker Alarm relay (optional) Fuse holder R TB 1 AR Distribution panelboard Main contactor Terminals (optional) Ground bus bar TB 2 Figure 28: HTPG power distribution panel 34 EN-RaychemXLTracePipeFreezeProtection-IM-H /16

39 5 Temperature Controls Three-pole main circuit breaker Three-pole main contactor Ø 1 Ø 2 Ø 3 N G Off Hand Auto C NC External controller/ thermostat* Contactor coil Panel energized Alarm remote annunciation (with alarm option) Power connection Heating cable End seal One-pole with 30-mA ground-fault trip (120/277 Vac) Two-pole with 30-mA ground-fault trip (208/240 Vac) Heating cable circuit Heating cable shealth, braid or ground Heating cable circuit Figure 29: HTPG schematic EN-RaychemXLTracePipeFreezeProtection-IM-H /16 35

40 6 Commissioning and Preventive Maintenance Pentair Thermal Building Solutions requires a series of commissioning tests be performed on the XL-Trace system. These tests are also recommended at regular intervals for preventive maintenance. Results must be recorded and maintained for the life of the system, utilizing the Installation and Inspection Record (refer to Section 9). Submit this manual with initial commissioning test results to the owner. 6.1 Tests A brief description of each test is found below. Detailed test procedures are found in Section 7. Visual Inspection Visually inspect the pipe, insulation, and connections to the heating cable for physical damage. Check that no moisture is present, electrical connections are tight and grounded, insulation is dry and sealed, and control and monitoring systems are operational and properly set. Damaged heating cable must be replaced. Insulation Resistance Insulation Resistance (IR) testing is used to verify the integrity of the heating cable inner and outer jackets. IR testing is analogous to pressure testing a pipe and detects if a hole exists in the jacket. Circuit Length Verification (Capacitance Test) The installed circuit length is verified through a capacitance measurement of the XL-Trace heating cable. Compare the calculated installed length against the system design. If the calculated length is shorter than the system design, confirm all connections are secure and the grounding braid is continuous. 36 EN-RaychemXLTracePipeFreezeProtection-IM-H /16

41 6 Commissioning and Preventive Maintenance Power Check The power check is used to verify that the system is generating the correct power output. This test can be used in commissioning to confirm that the circuit is functioning correctly. For ongoing maintenance, compare the power output to previous readings. The heating cable power output per foot is calculated by dividing the total wattage by the total length of a circuit. The current, voltage, operation temperature, and length must be known. Circuit length can be determined from as built drawings, meter marks on the heating cable, or with the capacitance test. The watts per foot can be compared to the heating cable output in Figure 32 on page 43 for an indication of heating cable performance. Ground-Fault Test Test all ground-fault breakers per manufacturer s instructions. EN-RaychemXLTracePipeFreezeProtection-IM-H /16 37

42 7 Test Procedures 7.1 System Tests The following tests must be done after installing the connection kits, but before the thermal insulation is applied to the pipe: 1. Visual inspection 2. Insulation resistance test After the thermal insulation has been installed on the pipe, the following tests must be performed: 1. Visual inspection 2. Insulation resistance test 3. Circuit length verification (Capacitance test) 4. Power test 5. Temperature test All test procedures are described in this manual. It is the installer s responsibility to perform these tests or have an electrician perform them. Record the results in the Installation and Inspection Record in Section 10. Visual Inspection Test Check inside all power, splice, and tee kits for proper installation, overheating, corrosion, moisture, or loose connections. Check the electrical connections to ensure that ground and bus wires are insulated over their full length. Check for damaged, missing, or wet thermal insulation. Check that end seals, splices, and tees are properly labeled on insulation cladding. Check the controller for proper setpoint and operation. Refer to its installation and operation manual for details. Insulation Resistance Test frequency Insulation resistance testing is required during the installation process and as part of regularly scheduled maintenance, as follows: Before installing the heating cable 38 EN-RaychemXLTracePipeFreezeProtection-IM-H /16

43 7 Test Procedures Before installing connection kits Before installing the thermal insulation After installing the thermal insulation Prior to initial start-up (commissioning) As part of the regular system inspection After any maintenance or repair work procedure Insulation resistance testing (using a megohmmeter) should be conducted at three voltages: 500, 1000, and 2500 Vdc. Potential problems may not be detected if testing is done only at 500 and 1000 volts. First measure the resistance between the heating cable bus wires and the braid (Test A), then measure the insulation resistance between the braid and the metal pipe (Test B). Do not allow test leads to touch junction box, which can cause inaccurate readings. Important: System tests and regular maintenance procedures require that insulation resistance testing be performed. Test directly from the controller or the junction box closest to the power connection. insulation resistance criteria A clean, dry, properly installed circuit should measure thousands of megohms, regardless of the heating cable length or measuring voltage ( Vdc). All insulation resistance values should be greater than 1000 megohms. If the reading is lower, consult Section 8, Troubleshooting Guide. Important: Insulation resistance values for Test A and B for any particular circuit should not vary more than 25 percent as a function of measuring voltage. Greater variances may indicate a problem with your heat-tracing system; confirm proper installation and/ or contact Pentair Thermal Building Solutions for assistance. EN-RaychemXLTracePipeFreezeProtection-IM-H /16 39

44 7 Test Procedures Test A L1 L2 Test B Attach to pipe Figure 30: Insulation resistance test 40 EN-RaychemXLTracePipeFreezeProtection-IM-H /16

45 7 Test Procedures insulation resistance test procedure 1. De-energize the circuit. 2. Disconnect the controller if installed. 3. Disconnect bus wires from terminal block. 4. Set test voltage at 0 Vdc. 5. Connect the negative ( ) lead to the heating cable metallic braid or RayClic green wire. 6. Connect the positive (+) lead to both heating cable bus wires or RayClic black wires. 7. Turn on the megohmmeter and set the voltage to 500 Vdc; apply the voltage for one minute. Meter needle should stop moving. Rapid deflection indicates a short. Record the insulation resistance value in the Inspection Record. 8. Repeat Steps 4 7 at 1000 and 2500 Vdc. 9. Turn off the megohmmeter. 10. If the megohmmeter does not self-discharge, discharge phase connection to ground with a suitable grounding rod. Disconnect the megohmmeter. 11. Repeat this test between braid and pipe. 12. Reconnect bus wires to terminal block. 13. Reconnect the temperature controller. Circuit length verification (capacitance test) Connect the capacitance meter negative lead to both bus wires and the positive lead to the braid wire. Set the meter to the 200 nf range. Multiply this reading by the capacitance factor for the correct heating cable shown below to determine the total circuit length. Length (ft or m) = Capacitance (nf) x Capacitance factor (ft/nf or m/nf) Table 8: Capacitance Factors Capacitance factor Heating cable ft/nf (m/nf) 5XL and 8XL 5.0 (1.6) 12XL 5.8 (1.8) Compare the calculated circuit length to the design drawings and circuit breaker sizing tables. EN-RaychemXLTracePipeFreezeProtection-IM-H /16 41

46 7 Test Procedures Figure 31: Capacitance test Power Check The power output of self-regulating heating cable is temperature-sensitive and requires the following special procedure to determine its value: 1. Power the heating cable and allow it to stabilize for 2 hours, then measure current and voltage at the junction box. If a controller is used, refer to details below. 2. Check the pipe temperature under the thermal insulation at several locations. 3. Calculate the power of the heating cable by multiplying the current by the input voltage and dividing by the actual circuit length. Power (w/ft or m) = Volts (Vac) x Current (Amps) Length (ft or m) The power calculated should be similar to the value generated by: Rated Power (w/ft or m) = Volts (Vac) x Rated Current 42 EN-RaychemXLTracePipeFreezeProtection-IM-H /16

47 7 Test Procedures Power W/ft ( 1) 40 (5) 50 (10) 60 (15) 70 (21) 80 (27) 90 (32) Pipe temperature 100 (38) 110 (43) 120 (49) 130 F (54)( C) 5XL1-CR and 5XL1-CT (120 V) 5XL2-CR and 5XL2-CT (208 V) 8XL1-CR and 8XL1-CT (120 V) 8XL2-CR and 8XL2-CT (208 V) 12XL2-CR and 12XL2-CT (208 V) Figure 32: Power output 7.2 Fault Location Tests There are three methods used for finding a fault within a section of heating cable. 1. Ratio method 2. Conductance method 3. Capacitance method Ratio Method The ratio method uses resistance measurements taken at each end of the heating cable to approximate the location of a bus wire short. A shorted heating cable could result in a tripped circuit breaker. If the resistance can be read on a standard ohm meter this method can also be used to find a fault from a bus wire to the ground braid. This type of short would trip a GFPD and show a failed insulation resistance reading. Measure the bus-to-bus heating cable resistance at each end (measurement A and measurement B) of the suspected section. EN-RaychemXLTracePipeFreezeProtection-IM-H /16 43

48 7 Test Procedures A B Figure 33: Heating cable resistance measurement test The approximate location of the fault, expressed as a percentage of the heating cable length from the front end, is: Fault location: D = A x 100 (A + B) Example: A = 1.2 ohms B = 1.8 ohms Fault location: D = 1.2 / ( ) x 100 = 40% To locate a low resistance ground fault, measure between bus and braid. Braid A B Figure 34: Low resistance ground-fault test The approximate location of the fault, expressed as a percentage of the heating cable length from the front end, is: Fault location: D = A x 100 (A + B) Example: A = 1.2 ohms B = 1.8 ohms Fault location: D = 1.2 / ( ) x 100 = 40% The fault is located 40% into the circuit as measured from the front end. 44 EN-RaychemXLTracePipeFreezeProtection-IM-H /16

49 7 Test Procedures Conductance Method The conductance method uses the core resistance of the heating cable to approximate the location of a fault when the heating cable has been severed and the bus wires have not been shorted together. A severed heating cable may result in a cold section of pipe and may not trip the circuit breaker. Measure the bus-to-bus heating cable resistance at each end (measurement A and measurement B) of the suspect section. Since self-regulating heating cables are a parallel resistance, the ratio calculations must be made using the conductance of the heating cable. A B Figure 35: Heating cable resistance measurement The approximate location of the fault, expressed as a percentage of the heating cable length from the front end, is: Fault location: D = 1/A x 100 (1/A + 1/B) Example: A = 100 ohms B = 25 ohms Fault location: D = (1/100) / (1/ /25) x 100 = 20% The fault is located 20% from the front end of the circuit. Capacitance Method This method uses capacitance measurement (nf) as described on Figure 30, to approximate the location of a fault where the heating cable has been severed or a connection kit has not been connected. Record the capacitance reading from one end of the heating cable. The capacitance reading should be measured between both bus wires twisted together EN-RaychemXLTracePipeFreezeProtection-IM-H /16 45

50 7 Test Procedures (positive lead) and the braid (negative lead). Multiply the measured capacitance with the heating cable s capacitance factor as listed in the following example: Example: 5XL2-CR = 16.2 nf Capacitance factor = 5.0 ft/nf Fault location = 42.2 nf x 5.0 ft/nf = 211 ft (64 m) The ratio of one capacitance value taken from one end (A) divided by the sum of both A and B (A + B) and then multiplied by 100 yields the distance from the first end, expressed as a percentage of the total heating cable circuit length. See Table 8 on page 41 for capacitance factors. Fault location: C = A x 100 (A + B) 46 EN-RaychemXLTracePipeFreezeProtection-IM-H /16

51 7 Test Procedures EN-RaychemXLTracePipeFreezeProtection-IM-H /16 47

52 8 Troubleshooting Guide Symptom Circuit breaker trips Probable Causes Circuit breaker is undersized Connections and/or splices are shorting out. Physical damage to heating cable is causing a direct short. Bus wires are shorted at the end. Circuit lengths too long. Nick or cut exists in heating cable or power feed wire with moisture present or moisture in connections. GFPD is undersized (5 ma used instead of 30 ma) or miswired. Low or inconsistent insulation resistance Nicks or cuts in the heating cable. Short between the braid and heating cable core or the braid and pipe. Arcing due to damaged heatingcable insulation. Moisture present in the connection kits. Test leads touching the junction box. 48 EN-RaychemXLTracePipeFreezeProtection-IM-H /16

53 8 Troubleshooting Guide Corrective Action Recheck the design for startup temperature and current loads. Do not exceed the maximum circuit length for heating cable used. Replace the circuit breaker if defective or improperly sized. Visually inspect the connection kits. Replace if necessary. Check for damage around the valves and any area where there may have been maintenance work. Replace damaged sections of heating cable. Check the end seal to ensure that bus wires are not shorted. If a dead short is found, the heating cable may have been permanently damaged by excessive current and may need to be replaced. Separate the circuit into multiple circuits that do not exceed maximum circult lengths. Replace the heating cable, as necessary. Dry out and reseal the connection and splices. Using a megohmmeter, retest insulation resistance. Replace undersized GFPD with 30-mA GFPD. Check the GFPD wiring instructions If heating cable is not yet insulated, visually inspect the entire length for damage, expecially at elbows in flanges and around valves. If the system is insulated, remove the connection kits one-by-one to isolate the damaged section. Replace damaged heating-cable sections. If moisture is present, dry out the connections and retest. Be sure all conduit entries are sealed, and that condensate in conduit cannot enter power connection boxes. If heatingcable core or bus wires are exposed to large quantities of water, replace the heating cable. (Drying the heating cable is not sufficient, as the power output of the heating cable can be significantly reduced.) Clear the test leads from junction box and restart. EN-RaychemXLTracePipeFreezeProtection-IM-H /16 49

54 9 Appendix Table A1 MAXIMUM CIRCUIT LENGTH IN FEET Start-up temperature ( F) 20 F 0 F 20 F 40 F 50 F (buried) 65 F (indoors grease) CB size (A) 5XL1 8XL1 5XL2 120 V 120 V 208 V 240 V 277 V * When circuit breaker sizing is listed in: black type, the value is for applications with a 40 F maintain red type, the value is for applications with a 110 F maintain 50 EN-RaychemXLTracePipeFreezeProtection-IM-H /16

55 9 Appendix Application 40 F/110 F Maintain* Circuit breaker sizing (ft) 8XL2 12XL2 208 V 240 V 277 V 208 V 240 V 277 V / / / / / / / / / / / / / / / / EN-RaychemXLTracePipeFreezeProtection-IM-H /16 51

56 9 Appendix Table A2 MAXIMUM CIRCUIT LENGTH IN FEET Start-up temperature ( C) 29 C 18 C 7 C 40 C 10 C (buried grease) 18 C (indoors grease) CB size (A) 5XL1 8XL1 5XL2 120 V 120 V 208 V 240 V 277 V * When circuit breaker sizing is listed in: black type, the value is for applications with a 4 C maintain red type, the value is for applications with a 43 C maintain 52 EN-RaychemXLTracePipeFreezeProtection-IM-H /16

57 9 Appendix Application 4 C/43 C Maintain* Circuit breaker sizing (fm) 8XL2 12XL2 208 V 240 V 277 V 208 V 240 V 277 V / / / / / / / / / / / / / / / / EN-RaychemXLTracePipeFreezeProtection-IM-H /16 53

58 9 Appendix Table A3 Transformer Sizing (Amperes/foot) Minimum start-up temperature ( F) 5XL1 8XL1 5XL2 120 V 120 V 208 V 240 V 277 V Table A4 Transformer Sizing (Amperes/meter) Minimum start-up temperature ( C) 5XL1 8XL1 5XL2 120 V 120 V 208 V 240 V 277 V EN-RaychemXLTracePipeFreezeProtection-IM-H /16

59 9 Appendix 8XL1 12XL2 208 V 240 V 277 V 208 V 240 V 277 V XL1 12XL2 208 V 240 V 277 V 208 V 240 V 277 V EN-RaychemXLTracePipeFreezeProtection-IM-H /16 55